WordPress Version: 4.6
/**
* Displays the search query.
*
* A simple wrapper to display the "s" parameter in a `GET` URI. This function
* should only be used when the_search_query() cannot.
*
* @since 2.7.0
*/
function _admin_search_query()
{
echo isset($_REQUEST['s']) ? esc_attr(wp_unslash($_REQUEST['s'])) : '';
}